Because there is at least two layers (ground and air) i think cannot use perspective camera view.
But in ortho camera i have no shadows. Its normal, to no shadows in ortho camera mode?
Can i use fake shadows with decal material or that using too much resources?
If im using look at targeting with line trace, thats look wierd in perspective camera.
And you can use perspective camera, use long lenses, in other words push lens up to 200 mm and position the camera until the level is in composition the long lens will flatten the image to almost ortho like view.